Questions: Which term refers to a synapse that releases acetylcholine from the presynaptic axon terminal? Cholinergic Serotonergic Adrenergic Electrical

Which term refers to a synapse that releases acetylcholine from the presynaptic axon terminal? Cholinergic Serotonergic Adrenergic Electrical
Transcript text: Which term refers to a synapse that releases acetylcholine from the presynaptic axon terminal? Cholinergic Serotonergic Adrenergic Electrical
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Solution

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The answer is the first one (or A): Cholinergic.

Explanation for each option:

  • Cholinergic: This term refers to synapses that release acetylcholine from the presynaptic axon terminal. Acetylcholine is a neurotransmitter involved in many functions including muscle activation and memory.
  • Serotonergic: This term refers to synapses that release serotonin, a neurotransmitter involved in mood regulation, sleep, and other functions. It is not related to acetylcholine.
  • Adrenergic: This term refers to synapses that release norepinephrine (noradrenaline) or epinephrine (adrenaline). These neurotransmitters are involved in the fight-or-flight response and are not related to acetylcholine.
  • Electrical: This term refers to synapses that transmit signals through direct electrical connections between neurons, known as gap junctions. This is a different mechanism from chemical synapses that release neurotransmitters like acetylcholine.

Summary: The term that refers to a synapse that releases acetylcholine from the presynaptic axon terminal is "Cholinergic."

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